manifest: Updates sdk-zephyr

Include:
samples: drivers: mbox: Enable sample on L09 and L20
nrfconnect/sdk-zephyr#2622
zephyrproject-rtos/zephyr#87124

Signed-off-by: Sebastian Głąb <sebastian.glab@nordicsemi.no>

Author: nordic-segl

west.yml

@@ -66,7 +66,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 5319cfc0718146a1bb21a856415d9b50abbf979e
+      revision: pull/2622/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above